影响4号岩石粉状铵梯油炸药产品质量的探讨

文中从原材料硝铵水分、热混压硝细度、木粉细度、半成品吸湿和成品水分等方面，探讨了４号岩石粉状铵梯油炸药产品的影响因素。     

水分含量对改性铵油炸药性能的影响

从水分含量对改性铵油炸药的爆炸性能和贮存期的影响进行了研究。发现水分含量为0.04%～0.20%范围内,对改性铵油炸药的爆速和殉爆距离具有明显影响;在水分含量不大于0.07%的情况下,改性铵油炸药在其贮存期内的爆速及殉爆距离能满足一般工程应用的要求。综合考虑水分对改性铵油炸药爆炸性能及贮存稳定性的影响,水分含量以不大于0.04%为宜。     

水分含量对改性铵油炸药性能的影响

从水分含量对改性铵油炸药的爆炸性能和贮存期的影响进行了研究。发现水分含量为0.04%～0.20%范围内,对改性铵油炸药的爆速和殉爆距离具有明显影响;在水分含量不大于0.07%的情况下,改性铵油炸药在其贮存期内的爆速及殉爆距离能满足一般工程应用的要求。综合考虑水分对改性铵油炸药爆炸性能及贮存稳定性的影响,水分含量以不大于0.04%为宜。     

温度和水分对硝酸铵粉碎性能影响的试验研究

文章从大量的试验着手,分析了温度、水分与提高硝酸铵粉碎效果的关系,并初步讨论了试验结果在生产中的应用。结果表明:温度对硝酸铵的粉碎效果有显著影响,而与水分无关。     

影响岩石膨化硝铵炸药爆速的因素

文章探讨了硝酸铵膨化后的水分含量、堆积密度、复合油相配制、混合碾磨条件及药卷装药密度等方面，影响岩石膨化硝铵炸药爆速的因素。     

全连续生产线上膨化硝铵炸药防结块研究

文章分别研究了表面活性剂、油相材料和木粉水分对连续生产线上膨化硝铵炸药结块性影响。研究发现,表面活性剂、高熔点油相、低水分木粉可以降低炸药结块性,尤其以表面活性剂的防结块效果最佳;同时采用表面活性剂、高熔点油相和低水分木粉能有效解决夏季高湿环境下全连续生产线上膨化硝铵炸药结块问题,以保证产品爆炸和贮存性能稳定。     

水分对粉状铵梯炸药殉爆的影响

该文在具有典型意义的水分范围内,探讨了水分对粉状铵梯炸药殉爆的影响,突破了水分在粉状铵梯炸药中只充当钝感剂的传统观点,并进行了理论解释。     

应用卡尔费休法测定膨化硝酸铵炸药的含水量

文章应用卡尔费休法测定膨化硝酸铵炸药的含水量,有效解决了WJ9026中蒸馏法在生产过程中应用时测试周期较长的问题,实现了膨化硝酸铵炸药在线水分的快速测定。通过与现行的几种工业炸药水分测定方法进行对比和验证试验后证实,卡尔费休法具有分析时间短、可进行连续反复测定、操作简便、测量精确度高、数据稳定、可靠等特点,是膨化硝酸铵炸药生产过程中一种重要的水分测定方法。     

影响2号岩石铵梯油炸药殉爆初探

文章从原材料水分、细度、复合油相的配制及混药温度等方面.探讨了2号岩石粉状铵梯油炸药殉爆性能的影响因素.     

卡尔·费休法测定乳化炸药含水量

文章对乳化炸药中水分的存在形式进行了分析,并提出了一种适用于乳化炸药含水量的测定方法——卡尔·费休水分测定法。经过测定不同生产工艺、不同乳化剂的乳化炸药样品的含水量,并作重现性试验和回收试验,表明该方法在测量乳化炸药含水量时,具有测量时间短、精度高、测量结果重现性好等特点,适合在生产线或实验室进行推广应用。     

Activating relaxation-controlled diffusion mechanisms for tailored moisture resistance of gelatin-based bioadhesives for engineered wood products

The feasibility of tailoring the moisture resistance of bioadhesives by activating relaxation-controlled diffusion mechanisms is demonstrated herein using gelatin, a hydrophilic biopolymer, as a model biobased resin for engineered wood products. The effect of gelatin-to-water concentration and tannin addition on the governing kinetics of water transport in gelatin-based bioadhesives was investigated in this work. Time-dependent flexural mechanical properties of laminated (a) gelatin and (b) gelatin–tannin wood veneer composites conditioned at both moderate and high humidity were characterized and compared to oriented strand board and plywood. Results indicate that increases in both gelatin and tannin content not only decrease rates of water uptake, volumetric swelling, and maximum moisture contents of gelatin-based resins, but also increasingly induce relaxation-controlled moisture diffusion behavior, which implies short-term moisture resistance and long-term moisture affinity. This behavior could be leveraged to address both in-service (i.e., strength, stiffness) and out-of-service (i.e., rapid biodegradation) requirements for engineered wood products.     

真空冷却豆制品水分布状态的核磁共振分析

利用低场核磁共振及其成像技术,研究真空冷却豆制品中水分分布状态.实验测得熟食豆制品真空冷却后其中的结合水、吸附水和自由水三种状态水的迁移过程.反映结合水的T21处于相对稳定的状态,经真空冷却后,发生变化的主要是T22(吸附水)和T23(自由水),吸附水和自由水明显减少;经真空冷却后,样品水分含量减少,体现在核磁共振成像图上,就是质子的流动性降低,使弛豫信号减弱,图像变暗.     

包装保存期预测的理论与数学模型

该文从包装材料的透湿性、透气性、包装商品的贮存温度、贮存湿度、商品内微生物的繁殖或死亡速率。以及商品品质变化等方面进行考虑,初步确定了包装保存期预测的一些数学模型。     

Sol-gel processing of tellurite powder

Tellurium ethoxide is highly sensitive to moisture in air and water. The hydrolysis and condensation of tellurium ethoxide exposed under different levers of water and moisture are investigated in this work and the hydrolysis products were characterised by infrared spectrometry and X-ray diffraction. The decomposition process of the product of tellurium ethoxide hydrolysed in air was analysed by differential scanning calorimetry and thermogravimetry. This work also studied the influence of sodium component on the phase transformation of the hydrolysis product in the decomposition process and on the morphology of the heat-treated hydrolysis products.     

Moisture sorption isotherms for paper and paperboard in food chain conditions

The moisture content of paper and paper‐based packaging materials affects packaging function and integrity. For perishable food products it is especially important to understand the moisture sorption properties of paper based materials in high humidity, and the frozen to ambient temperature conditions experienced during storage and distribution. This paper reviews the published moisture sorption isotherm data for paper and paper based materials and the reasons for the differences in measured behaviour of different materials. Particular focus is made on the availability and prediction of the moisture sorption isotherm in the high relative humidity region. Copyright © 2006 John Wiley & Sons, Ltd.     

Accurate determination of the mean relative humidity in controlled climates at high humidities (new method)

The measurement of the relative humidity (RH) at high levels to the desired accuracy is still a problem, especially for levels above 90% RH. The reasons for this are:

• i The accuracy of the standard apparatus is lower at high RH than at moderate and low RH;
• ii The need for accurate measurement of the RH in moisture controlled rooms is greater at high RH than at lower RH, because for moisture sensitive products, such as fibreboard boxes and certain horticultural products, the influence of a minor deviation in RH on the properties of these products is considerably greater at high RH than at moderate and low RH.

     

烟盒多层包装对水分阻隔影响研究

目的 卷烟包装的阻隔性能是卷烟产品品质稳定性的关键影响因素,研究干燥环境中卷烟多层包装对水分阻隔的作用。方法 利用自主研发测试系统——动态水分分析气候箱,考察不同盒包在特定温湿度条件下水分扩散过程,计算水分扩散通量,并对包装阻湿性能进行量化表征。结果 建立的烟盒多层包装水分阻隔性能评价方法可准确量化表征包装的阻湿性能。低湿条件下,水分从烟盒包装各层空隙及材料的透过量各有差异,对于Bopp膜,60%以上的水分主要从材料扩散,对于不同商标纸和内衬纸,水分从材料及空隙扩散的分配比不同。对于整体包装水分阻隔性能,三层材料中Bopp膜对烟支水分稳定性作用的占比达90%以上,硬包优于软包。准确预测了烟支在不同盒包中水分的散失速率,低湿条件下,硬包卷烟的水分散失速率明显低于软盒卷烟的。结语 文中建立了多层烟盒包装阻湿性测试及评价方法,量化表征了卷烟盒包各包装层及不同部位对水分的阻隔作用,明晰了烟盒包装中影响卷烟水分稳定性的重要因素。     

不同含水量木质生物质的粉碎特性研究

为考察不同含水量木质生物质的粉碎特性,用人工喷洒方式制备一定含水量的木质生物质,并利用配有热风炉的超级涡流磨在最大加工能力条件下进行粉碎实验。结果表明,木质生物质产品的粒度、均匀性系数先增加后减小;长径比总体呈增长趋势;振实密度和松装密度逐渐减小;压缩比先变化缓慢,然后增加;产品的含水量、生产能耗逐渐增加。     

Proportional control of moisture content of granules by adjusting inlet air temperature in fluidized bed granulation using near-infrared spectroscopy

For process control of fluidized bed granulation process, we investigated proportional (P) moisture content control via adjustment of inlet air temperature in proportion to the difference between measured and target moisture content of granules. Here, we first validated P moisture content control by comparison with bed temperature control. We then confirmed that P moisture content control is effective in maintaining the moisture content, and in minimizing the variance of the particle size of granules following granulation. Furthermore, we observed that when the target temperature was higher than the measured value of inlet air temperature the P moisture content control response was accelerated. In contrast, when the target temperature was less than the measured value of inlet air temperature (<50 °C) the response was delayed. In summary, P moisture content control has good scalability and can be introduced without changing granulation conditions in the development of orally administered pharmaceutical products.     

Development of decay performance models for outdoor timber structures

Performance based building (PBB) and design is closely connected to various needs and requirements: Performance levels need to be defined, test methods for verification of performance need to be developed, and reliable performance data are needed for materials, products, constructions, and different design solutions. In contrast to other building materials, PBB and thus service life prediction of timber and wood-based products requires particular consideration of wood-degrading organisms and their physiological needs. For the most relevant group of wood-destroying organisms, which are the different decay fungi and bacteria, wood moisture content and temperature need to be considered as key factors. This study aimed on the development of performance models on the basis of hard data obtained in field trials performed under most realistic conditions. Dose–response relationships, which can serve as essential parts of a performance based design model, were derived from material climatic data and corresponding decay development in the field. Different dose–response models are proposed and evaluated for predicting onset (and progress) of decay when wood is exposed to a dynamic and arbitrary climate exposure described in terms of time series of coupled temperature and moisture content. A logistic dose–response model was primarily focused on describing the relation between exposure and decay rating for moisture traps with long periods of high moisture contents. A two-step linear engineering model was more focused on predicting the behavior in a wider, more simplified, sense where periods of high moisture content are interrupted by periods of drier and/or colder climate.